Halton Tractor Company was located in Portland, Oregon from 1940 until 2010, Alexander was a marketing company that made advertising pencils & tape measures & pocket screwdrivers back in the 1960’s & 1970’s. Nice condition working mechanical pencil Caterpillar Diesel Company heavy equipment Vintage Circa 1960’s Alexander Advertising Mechanical Pencil Engine Power By Caterpillar Halton Tractor Co Working Condition Needs Eraser